143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* hdac-ext-bus.c - HD-audio extended core bus functions.
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*
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* Copyright (C) 2014-2015 Intel Corp
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* Author: Jeeja KP <jeeja.kp@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <sound/hdaudio_ext.h>
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MODULE_DESCRIPTION("HDA extended core");
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MODULE_LICENSE("GPL v2");
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/**
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* snd_hdac_ext_bus_init - initialize a HD-audio extended bus
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* @bus: the pointer to HDAC bus object
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* @dev: device pointer
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* @ops: bus verb operators
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* @ext_ops: operators used for ASoC HDA codec drivers
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*
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* Returns 0 if successful, or a negative error code.
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*/
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int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
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const struct hdac_bus_ops *ops,
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const struct hdac_ext_bus_ops *ext_ops)
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{
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int ret;
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ret = snd_hdac_bus_init(bus, dev, ops);
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if (ret < 0)
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return ret;
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bus->ext_ops = ext_ops;
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/* FIXME:
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* Currently only one bus is supported, if there is device with more
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* buses, bus->idx should be greater than 0, but there needs to be a
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* reliable way to always assign same number.
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*/
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bus->idx = 0;
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bus->cmd_dma_state = true;
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
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/**
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* snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
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* @bus: the pointer to HDAC bus object
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*/
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void snd_hdac_ext_bus_exit(struct hdac_bus *bus)
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{
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snd_hdac_bus_exit(bus);
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WARN_ON(!list_empty(&bus->hlink_list));
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
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/**
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* snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
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*
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* @bus: the pointer to HDAC bus object
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*/
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void snd_hdac_ext_bus_device_remove(struct hdac_bus *bus)
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{
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struct hdac_device *codec, *__codec;
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/*
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* we need to remove all the codec devices objects created in the
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* snd_hdac_ext_bus_device_init
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*/
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list_for_each_entry_safe(codec, __codec, &bus->codec_list, list) {
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snd_hdac_device_unregister(codec);
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put_device(&codec->dev);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
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#define dev_to_hdac(dev) (container_of((dev), \
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struct hdac_device, dev))
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static inline struct hdac_driver *get_hdrv(struct device *dev)
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{
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struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
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return hdrv;
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}
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static inline struct hdac_device *get_hdev(struct device *dev)
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{
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struct hdac_device *hdev = dev_to_hdac_dev(dev);
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return hdev;
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}
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static int hda_ext_drv_probe(struct device *dev)
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{
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return (get_hdrv(dev))->probe(get_hdev(dev));
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}
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static int hdac_ext_drv_remove(struct device *dev)
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{
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return (get_hdrv(dev))->remove(get_hdev(dev));
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}
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static void hdac_ext_drv_shutdown(struct device *dev)
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{
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return (get_hdrv(dev))->shutdown(get_hdev(dev));
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}
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/**
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* snd_hda_ext_driver_register - register a driver for ext hda devices
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*
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* @drv: ext hda driver structure
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*/
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int snd_hda_ext_driver_register(struct hdac_driver *drv)
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{
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drv->type = HDA_DEV_ASOC;
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drv->driver.bus = &snd_hda_bus_type;
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/* we use default match */
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if (drv->probe)
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drv->driver.probe = hda_ext_drv_probe;
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if (drv->remove)
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drv->driver.remove = hdac_ext_drv_remove;
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if (drv->shutdown)
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drv->driver.shutdown = hdac_ext_drv_shutdown;
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return driver_register(&drv->driver);
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}
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EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);
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/**
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* snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
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*
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* @drv: ext hda driver structure
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*/
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void snd_hda_ext_driver_unregister(struct hdac_driver *drv)
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{
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driver_unregister(&drv->driver);
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}
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EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);
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